57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
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//
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// experimental/detail/has_signature.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_EXPERIMENTAL_DETAIL_HAS_SIGNATURE_HPP
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#define BOOST_ASIO_EXPERIMENTAL_DETAIL_HAS_SIGNATURE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#include <boost/asio/detail/type_traits.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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namespace experimental {
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namespace detail {
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template <typename S, typename... Signatures>
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struct has_signature;
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template <typename S, typename... Signatures>
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struct has_signature;
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template <typename S>
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struct has_signature<S> : false_type
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{
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};
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template <typename S, typename... Signatures>
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struct has_signature<S, S, Signatures...> : true_type
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{
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};
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template <typename S, typename Head, typename... Tail>
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struct has_signature<S, Head, Tail...> : has_signature<S, Tail...>
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{
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};
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} // namespace detail
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} // namespace experimental
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // BOOST_ASIO_EXPERIMENTAL_DETAIL_HAS_SIGNATURE_HPP
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